Oh, I do have my share of similar pictures (not as crisp and sharp as yours, mind you). I guess it's in their education: They're told, "That's why we're call 'ducks'. When you see a camera pointed your way, duck..."
The top end of a down bound duck. I have lots of those, and ones of them going down and coming up. I just need a big enough memory card in the 7DII and hold the button down a while.
And several of my sharpest most detailed feather patterns are of this type.
Oh, I do have my share of similar pictures (not as crisp and sharp as yours, mind you). I guess it's in their education: They're told, "That's why we're call 'ducks'. When you see a camera pointed your way, duck..."